<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<link rel='stylesheet' href='../css/shadow.css'>
</head>
<body>
<div id="div1" class="shadow_class">진한 그림자</div>
<div id="div2" class="shadow_class">흐린 그림자</div>

</body>
</html>